RHS 100x80x8.2 Açotubo · Weight & Dimensions

Açotubo, cold-formed sections · Rectangular Hollow Section

Rectangular Hollow Sections (RHS) are tubular profiles with excellent torsional resistance and aesthetic appeal. Used for columns, trusses, and exposed structural elements.

Also known as: PTR 100x80 (México) · Caño estructural 100x80 (Argentina)

The RHS 100x80x8.2 steel profile weighs 19.7 kg/m (13.24 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 2,509.882 mm². Moment of inertia Ix = 316.444 cm⁴, Iy = 221.938 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	80 mm	3.15 in
Thickness (t)	8.2 mm	0.32 in
Fillet radius (r)	16.4 mm	0.65 in
Weight	19.7 kg/m	13.24 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,509.88 mm²	3.890 in²
Moment of inertia (Ix)	316.44 cm⁴	7.60 in⁴
Moment of inertia (Iy)	221.94 cm⁴	5.33 in⁴
Elastic section modulus (Sx)	63.29 cm³	3.862 in³
Elastic section modulus (Sy)	55.48 cm³	3.386 in³
Plastic section modulus (Zx)	80.48 cm³	4.911 in³
Plastic section modulus (Zy)	68.8 cm³	4.198 in³
Radius of gyration (rx)	3.55 cm	1.398 in
Radius of gyration (ry)	2.97 cm	1.171 in